清楚默认样式 * {
  margin: 0;
  padding: 0;
  /* box-sizing: border-box;  */
}

ul li,
ol li {
  list-style: none;
}
/* 清除浮动 */
.clear {
  clear: both;
  font-size: 1px;
  width: 1px;
  visibility: hidden;
  margin-top: 0px !important;
  *margin-top: -1px;
  line-height: 0;
}
.clearfix::after,
.clearfix::before {
  content: "";
  display: block;
  clear: both;
  height: 0;
  font-size: 0;
  line-height: 0;
  overflow: hidden;
}
.clearfix {
  *zoom: 1;
}
table {
  /* 细线边框属性   collapse合并*/
  border-collapse: collapse;
}